feat: enhance jobs list stats with tooltips, icons, and refresh count

- Add Tooltip UI component for styled hover tooltips
- Replace native title attributes with Tooltip on all job stats
- Add refresh icon (green) showing actual refreshed count for metadata refresh
- Add icon+tooltip to scanned files stat
- Add icon prop to StatBox component
- Add refreshed field to stats_json types
- Distinct tooltip labels for total links vs refreshed count

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

apps/backoffice/app/jobs/[id]/page.tsx

@@ -587,7 +587,16 @@ export default async function JobDetailPage({ params }: JobDetailPageProps) {
             </CardHeader>
             <CardContent>
               <div className="grid grid-cols-2 sm:grid-cols-4 gap-4">
-                <StatBox value={refreshReport.refreshed} label={t("jobDetail.refreshed")} variant="success" />
+                <StatBox
+                  value={refreshReport.refreshed}
+                  label={t("jobDetail.refreshed")}
+                  variant="success"
+                  icon={
+                    <svg className="w-6 h-6 text-success" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                      <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M4 4v5h.582m15.356 2A8.001 8.001 0 004.582 9m0 0H9m11 11v-5h-.581m0 0a8.003 8.003 0 01-15.357-2m15.357 2H15" />
+                    </svg>
+                  }
+                />
                 <StatBox value={refreshReport.unchanged} label={t("jobDetail.unchanged")} />
                 <StatBox value={refreshReport.errors} label={t("jobDetail.errors")} variant={refreshReport.errors > 0 ? "error" : "default"} />
                 <StatBox value={refreshReport.total_links} label={t("jobDetail.total")} />